This is the 14750th most frequent Polish word.
płynie
"Flows" or "is flowing."
Here, 'płynie' is used to describe the physical flow or movement of the river.
Rzeka płynie przez miasto.
The river flows through the city.
In this sentence, 'płynie' metaphorically represents the progress or passage of time.
Czas płynie bardzo szybko.
Time flows very quickly.
Here, the verb 'płynie' (conjugated as 'płyną' for plural) refers to the literal movement of ships on water.